Fuel-feeding means for internal-combustion engines.



JV.`S?EVEFSON FUEL FEEDING MEANS FOR INTERNAL CGMBUSTION ENGINES.

APPLICATION Fi-LED SET. i5. |916.

Inail, A

Arron/vw WILIIAMSTEVNSO'N, @E hometown, newness vT o aZZ inkomitfmaycomern:

Beit

own that I, VILLLAM Srnviiivsom a citizen of the United States, residing at Morristown, in the county of Morris and Specification :of Iettersateiit,

of Fig. 2;

State of liew Jersey, have inventedcertainnew and useful Improvements in Fuel-Feeding Means L-:or Internal-Combustion Engines, of which the following is a. specification.

This invention relates to internal combustion engines of the class which depend upon gasolene or a. similar volatile combustible liquid as the fuel, and itcontemplates utilizing, to form the combustible, the vapor given 4 bylsuch a liquid concurrently with the" v'use inthe regular wayy of the liquid itself econom offuel an increase of nitheforniqof a spray, whereby Vto obtain an power, and greater facility of starting the motor.

5- i My invention consists in the combination, "with fthe manifoldor like intake element of an internal combustion engine of the class :.1 `fi'iidicated, and a carbureter including a spraying device for the intake element and a float-chamber orlother liquid fuel reserve chamber, of tubular connection extendingfrom said c nber kabove the normal liquid level therein .to the intake. By 'taking the vapor direct. from the float-chamber' or,

equivalent to the intake I make it possible 'to yemploy a very siniple for-in of connection and at the same timetake advantage of a ASource that is copiousin vapor on vaccount ofthe excitation of the liquid fuelincident to its ingress to and egress fronisaid chain'- ber.

the inlet end of said connection in a manner toprevent the fuel in liquid form from being drawny thereinto at certain times, as when theacarbureter is flooded.

.My'i'nvention further consists in forming thev `delivery end of said connection in a manner'to insureagainst back-firing from .the engine reaching the 'float-chamber, and

so as to obtain certain other .practical results,l as simplicity' ofconstruction and facility vof attaching the connection `to ythe' intake.. f i,

' In the accompanying drawing,

Figure 1 'is a view showingv anintake manifold andV carbureter ofarconventional type, and my appliance associated therewith, 'l the said parts appearing partly in side elevation and partly in section;

F ig. 2 is a sectional view of the intake end of said appliance, the plane of the section Myinvention further consists in forming i vEUnL- rnnniiiie' Mnnn's'ironfiNTnnnaL-coiuieus'rionfnneiNg; i

Application filed September-15,1916. Serial Noi'lOSl. f,

being substantiallyncoincirlent Y the axis of said end; l

` Fig. 3 is a sectional viewon the line 3-3 Fig. 4- is a A.ofthe elbowshown' in Fig.

F ig; 5 is aside elevatiompartlv-'in section,

*ofthe nipple at-"the intake endfofthe appliance. 1, i,

The intake a forftheengine b shown by broken lines includes the branched portion 0, or manifold proper, .connected tothe engine and the air'pass'age d, having a throttle valve e, of a carbureter indicatedV generally by the reference character' 7; in lthe air pas- Sage d' is a Venturiltube g into which discharges upwardly the spray nozzle. itl-which is supplied with .liquid fuel l through thelport from the float-chambery', the oa't tor-equivinternal combustion engine employing a'carbureter.

Above" the' n0rmai1quia-ievei ail the fionchamber j I connect thereto a tubular-conductor m which leads to and lis connected i with the unbranched portion or stem of the manifold proper. The communication afforded; between the. oat chamber and the intake @by such conductor is'restricted so that the volume of Huid capable of passing therethrough is less than that capable of entering the air inlet Z of the float-chamber.

In consequence of this construction, while 'atmospheric pressure remains availablev to maintain delivery ofthe liquid 'fuel-at the spray nozzle h, vso that" the engine' is,l fed'A withj a mixture of air (passing vthrough the -venturi g) and the atomized'liquid fuel in the usual way, the vapor given, off bythe liquid fuel in the float chainber, -a'ndjconstantly. replenished on account of the'fexcitation incident tothe ingress to and-'egress from" said chamber of the liquid f-'uelgitogether with some of the air admitted at the inlet Z, is drawn as a mixture with said air directly into the intake a and so into the engine. Since the fuel as thus fed through the connection m to the engine is a most highly divided form thereof (vapor), the operation of the engineris of course verv considerably Stimulated, in consequence of which I am able to obtain not only a large saving of fuel but a very appreciable increase of power, and besides greatly facilitate the starting of 'the engine.

As preferably employed, the conductor m .is constructed as follows:

It includes the pipe or conductor proper n formed of flexible metallicv tubing so that it nipple. Said nipple is threaded at its lower end as shown in Fig. 5 and is screwed into a suitable hole tapped into the top wall of the float-chamber. Said nipple is bored to form a relatively large chamber o3 extending well up into the same, the outlet from which is an orifice o that is restricted to a -diameter less than that of the air inlet Z of the floatchamber, so that the volume of fluid capable of passing therethrough is less than that of said air inlet, as already explained. Air from the inlet Z flows direct, without downward deflection; tothe mouth of the conductor, so that in case of flooding only gaseous fluid, and not raw or liquid gasolene, will be drawn into the conductor, even the tendency of capillary attraction to conduce to the sucking up of the liquid gasolene into the conductor being prevented by enlarging the intake end thereof, as at o3.

At the other end of the pipe n. is a fitting including a nipple, a union for connecting the nipple to said end of the pipe, an elbow, a valve-chamber connected with said nipple by the elbow and containin a valve, and another nipple connecting t e valvechamber with the manifold proper of the intake a: The iirst'nipple g has one end tapered and forming a sealed joint with the flared end n2 of the pipe n-and is externallyl threaded at both ends and includes an intermediate nut g. The joint between the nipple and said end of the pipe is maintained by the union r, which is screwed onto one end of the nipple and vswiveled on said end of the pipe. The elbow s has the other end of the nipple screwed into the same at one end and into the other end of the elbow is screwed the closed end of the lcup-shaped valve-y,

Lmanifold properof the intake a, said nipple having an enlarged intermediate nut u' formed thereon. One or more orices t are formed in the bottom of the valve-cham ber t, these being ada ted to be closed by a valve lv which is hel against the inner or engine side. of the bottom wall of the valve@ chamber by a spring w coiled about a screw and interposed between the head m' thereof and the valve, said screw penetrating the bottom of the valve-chamber and havin adjusting nut as" screwed on its free en The spring w, by adjusting the nut m2 on y the screw m, 1s set so that it will yield to the pressure developed in pipe n when the engine is running. Following each suction of the engine it seats, in consequence of which, should the pressure at the engine side of the valve preponderate over that at the op 'te side thereof, as in the case of a back-iii?,1 it seals oil' the communication through the conductor m, preventing the fire from reachin@r the float-chamber. v 4- I-Iaving thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In combination, with the intake ofen internal combustion engine and a carbureter including a liquid-delivery device for the intake and a covered constant-level volatile liquid reserve chamber delivering to said device and having above the normal li uid level therein an air-inlet, a tubular con uctor connecting said chamber above said level with the intake and having a relatively enlarged mouth at the chamber end thereof, the top of said chamber permitting fluid flow, without downward deflection, from the chamber, an elbow having screw-thread conl nection with the valve-chamber, and having said pipe operatively connected at one end therewith and a check-valve housed in the valve chamber and normally spring held toward said fuel reserve chamber to close the passage through said conductor.

In testimony whereof I ailix my signature.

WILLIAM sTEvNsoN. 

